Composum Browser is an Open Source JCR Node browser for Apache Sling which bills itself as "the Swiss knife for the repository". Composum Browser is included in Apache Sling since Sling 9 and is available in all versions of Apache Sling CMS. While Composum Browser certainly supports navigating the JCR repository structure in Apache Sling, it can do much more. Here are four useful features in Composum Browser: Edit Files Editing files in the repository using Composum is pretty straight-forward. First select the node for the file, select the Text / Code View and then select the Edit Text button which will open the editor.